1 /******************************************************************************
2  *
3  *  Copyright (C) 2015 Google Inc.
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 #include <assert.h>
20 #include <time.h>
21 
22 #include "hci/include/btsnoop_mem.h"
23 
24 static btsnoop_data_cb data_callback = NULL;
25 
btsnoop_mem_set_callback(btsnoop_data_cb cb)26 void btsnoop_mem_set_callback(btsnoop_data_cb cb) {
27   data_callback = cb;
28 }
29 
btsnoop_mem_capture(const BT_HDR * packet)30 void btsnoop_mem_capture(const BT_HDR *packet) {
31   if (!data_callback)
32     return;
33 
34   assert(packet);
35 
36   const uint8_t *data = &packet->data[packet->offset];
37   const uint16_t type = packet->event & BT_EVT_MASK;
38   size_t length = 0;
39 
40   switch (type) {
41     case BT_EVT_TO_LM_HCI_CMD:
42       if (packet->len > 2)
43         length = data[2] + 4;
44       break;
45 
46     case BT_EVT_TO_BTU_HCI_EVT:
47       if (packet->len > 1)
48         length = data[1] + 3;
49       break;
50 
51     // Ignore data for privacy
52     case BT_EVT_TO_LM_HCI_ACL:
53     case BT_EVT_TO_LM_HCI_SCO:
54     case BT_EVT_TO_BTU_HCI_ACL:
55     case BT_EVT_TO_BTU_HCI_SCO:
56       break;
57   }
58 
59   if (length)
60     (*data_callback)(type, data, length);
61 }
62